diff --git a/ext/gmp/config.m4 b/ext/gmp/config.m4
index bbc524c5406..f996ae978f7 100644
--- a/ext/gmp/config.m4
+++ b/ext/gmp/config.m4
@@ -17,9 +17,9 @@ if test "$PHP_GMP" != "no"; then
     AC_MSG_ERROR(Unable to locate gmp.h)
   fi
   PHP_ADD_INCLUDE($GMP_DIR/include)
-	
 
   PHP_NEW_EXTENSION(gmp, gmp.c, $ext_shared)
   AC_DEFINE(HAVE_GMP, 1, [ ])
-  PHP_ADD_LIBRARY_WITH_PATH(gmp, $GMP_DIR/lib)
+  PHP_SUBST(GMP_SHARED_LIBADD)
+  PHP_ADD_LIBRARY_WITH_PATH(gmp, $GMP_DIR/lib, GMP_SHARED_LIBADD)
 fi